Start and stop control for power machines



Dec. 4, 1934. c MORTIMER 1,983,389

START AND STOP CONTROL FOR POWER MACHINES V Original Filed June 19, 19313 Sheets-Sheet l @II u llllll I x m? 1 1 1 Q N L' R f @w w R w v O I O ag M kAlf N y n lr 1 A. j 1 w e O a o (00% Q INVENTOR 54M! Jm uwwrroRNEYJ Dec. 4, 1934. c. G. MORTIMER 1,983,389

START AND STOP CONTROL FOR POWER MACHINES I Original Filed June 19, 19513 Sheets-Sheet 2 INVENTOR fla ORNEYJ Dec. 4, 1934. c MORTIMER 1,983,389

START AND STOP CONTROL FOR POWER MACHINESv Ofiginal Filed June 19, 1931-3 Sheets-Sheet 3 INVENTOR l atented Dec. 4, 1934 START AND STOP CONTROLFOR POWER MACHINES Charles G. Mortimer, Glen Ridge, N. J., assignor toJoseph H. Lynch, Ashury Park, N. J.

Original application June 19, 1931', Serial No. 545,424. Divided andthis application July 27,

1932, Serial No. 625,166

3 Claims.

The present invention. relates to intermittent hand controlled startingand automatic stop devices for power machines. It is here illustrated inconnection with a machine for forming, em-

bossing and afiixing tags for laundry, more fully described in myapplication for Letters Patent, Serial No. 545,424, filed June 19, 1931,of which the present application is a division.

The object of the present invention is a combination of mechanismwhereby power machines may be started only whenthe work piece is inproper position, for instance a position of a piece of laundry, toreceive a tag, and whereby the machine is automatically disconnectedfrom l5v the power source to stop the machine when it has completed aprearranged sequence of movements, whether or not the hand control hasbeen released, and whereby the machine cannot be again started Without anew placing of a work 20. piece in position. The elements andcombinations constituting the invention will first be fully describedwith reference to the accompanying drawings and then pointed out in theclaims.

In said drawings- Figure l is a rear View, with the casing in section,of a tag-forming, embossing and applying machine, illustrating anapplication of my invention.

Figure 2- is a cross-sectional view of the ma- 30. chine substantiallyalong line 2-2, Figure 1,

looking in the direction of the arrows.

Figure 3 is a rear view showing the coupling to connect the main-shaftof the machine to the power drive and the feeding mechanism with its vcoupling, both couplings being shown partially in cross-section.

Figure 4 is a cross-sectionalview substantially taken along line 4-4,Figure 3, and looking in the direction of the arrows.

Figure 5 is a cross-sectional view of the main clutch, takensubstantially along line 5-5, Figure 3, and looking in the direction ofthe arrows.

Figure 6 shows the eccentrics and is a crosssectional View, taken alongthe line 6-6, Figure 3, looking in the direction of the arrows, and

Figure 7 is a diagram of the electric wiring and main operatingswitches.

The invention having been especially developed for application to amachine for forming,

embossing and affiXing tags to pieces of laundry, will be convenientlydescribed in its preferred relation to such a machine, without therebyintending to limit the use of the invention to such a machine- In thedrawings, 1 is the metal rib- 55. bon from which the tags are made. Themetal ribbon comes from a magazine roll of conventional design, notshown. The ribbon runs over an idler 2, which acts as a guide andsecures the contact of. the ribbon with the fee-:1 roll 3 over a longpart of its circumference. From this feed roller the ribbon is forcedthrough straightening rolls 6, 7 and 8. After leaving the straighteningrolls, the ribbon enters the die device 10 through slot 11 acting as aguide.

In order to convey the ribbon through the whole machine, the machinemust be operated until the first finished tag appears at the slot 12,the front. of the machine (Figure 2) or after five operations of themachine. The material to be identified i's'inserted into slot 12 and theidentification tag applied, as described in the original application, ofwhich this is a division.

The machine is started whenever the operator presses the push buttons13, 13a. There is a pair of such buttons, one on either side of theplatenll. The piece of fabric, or whatever material must be providedwith tags, is held on platen 14 and pushed into the slot 12 and it isapparent that the operator when holding the material can easily reachboth buttons 13 and 18a. The operator automatically stretches thematerial over the platen 14. in order to reach the two buttons 13 and13a located on the sides of the platen. This ensures that the tag isapplied to an unwrinkled portion of the material, which,

- e. g. in the case of laundry, prevents wrinkles which would be ironedin later on.

Figure 7 is a diagram of the electric circuit into which. buttons 13 and130. are inserted. 200 is the sourceof electric power. The currentflowsfrom the pole to the contact lever 15. As soon as button 13 ispressed against the resistance of spring 16, contact is made between theinturned point 49 of lever 15 and toe 17, pivoted on contact rod 18.Figure 7 shows this position. Toe 17 is normally held in a positionperpsndicular tothe contact rod 18 by means of springmembers 19 andtongue 20 which is an extension of the toe l7. Suitable insulation isprovided to secure the fiow of current in the above described way.

Further depression of the button 13 causes the toe 17 to be turnedupwardly with respect to rod 18, as shown in dot and dash lines onFigure '7, and also causes contacting of the points 21 and 22. t must benoted that the toe 17 and the upper end of 15 remain in contact when 21reaches 22. Flow of current is then established. between 15 and thesolenoid coil 23 up to terminal 24. By the simultaneous pressing ofbutton 13a, the complete circuit is closed. The contacts 491'7 are inseries with contacts 21-22, and contact at 4917 is maintained when thecontact is made at 21-22.

As soon as power is by this means supplied to 23, the solenoid core 25is pulled into the coil and takes with it connecting rod 26 and bellcrank 27 which is fulcrummed at 23 and linked to cam track 29 by meansof link 30. Cam track 29 is pivoted at 31 to a stationary support 32.

The fly wheel 33 is driven by a belt or the like from a motor not shown.A pinion 34 is attached to 33 and engages with a tooth wheel 35 which isfree on shaft 36. To the wheel 35 a collar 37 is attached. This collaris provided with a plurality of notches 38, shown on a large scale onFigure 5. These notches are adapted to receive the inner end of clutchdog 39. This dog is held up by means of the arc-shaped cam track 29riding under the lip 40. It engages with one of the notches 38 as soonas 29 is removed from the holding lip 40 of dog 39 by thealready-described mechanical operations following the energizing ofsolenoid 23; thereupon it drops into one of the notches 38 owing topressure of the spring 41. It will be noted that a plurality of notches38 are provided to reduce the intermission between the moment the pushbuttons 13 and 13a are depressed, and the moment the shaft 36 begins torevolve.

Clutch dog 39 slides in a radial'slot in the clutch plate 42 which ispinned onto shaft 36 by means of pin 201. This pin is a safeguardagainst overloading other vital parts of the ma-- chine and will be ofsufficiently soft material or small size to limit the power transmittedby 36.

As soon as clutch dog 39 engages with one of the notches 33, the shaft36 will be turned one turn or until the dog lip 40 rides up on cam track29. This cam track goes back into its original position as soon as shaft36 and disc 42 have revolved enough to allow a return of 29 withoutinterfering with 39. This is accomplished by a cam 43 on shaft 36, whichengages with a cam follower 44, Figure 4. 44 operates via the bell crank45, a link 46, another bell crank 47, and another link 48, the contactlever 15, shown also on Figure 7. Thus the engagement of the cam 43causes a disengagement of contact lever point 49 and contact toe 1'7.The power applied to the solenoid 23 is interrupted no matter whetherbuttons 13 and 13a are still pressed or not and the cam track 29 isbrought back to its original position to engage under lip 40 by means ofa spring 50. The engagement of cam follower 44 and cam 43 is secured bymeans of spring 51. The last-described operation may be designated as aclutch safety release. This definitely insures that shaft 36 is stoppedagain after having made one full turn, no matter whether the pushbuttons are depressed during this period or are left depressed byinadvertence. The push buttons must be released before operating themachine a second time. This will cause the operator to withdraw thepiece onto which the tag was applied and will help to prevent two ormore tags from being applied at the same point.

When contact lever 15 is operated from cam 43, a free snapping of toe1'7 into the position 53, shown by dotted lines on Figure '7, issecured. Upon releasing button 13, the contact pin goes back and contactpoints 21 and 22 are disengaged. If 15 moves back because of furtherturning of cam 43 before the button 13 was released, the toe 17 wouldpass the point 49 upon releasing of 13 and go back to the uppermostposition.

It is obvious from the above that shaft 36 cannot make one fullrevolution without the driven coupling member 42 being disconnected fromthe driving member 37, and during this revolution, the variousoperations of the machine upon the ribbon and tag are performed, all themechanisms performing such operations being operatively connected to themain shaft 36.

I claim:-

1. In a machine of the character described, the combination of drivingand driven members, a releasable coupling for said members, and meansfor controlling said coupling, comprising an electric circuit whichincludes, in series, an electro-magnet, a switch manually operated forclosing the circuit to engage the coupling and automatically operated toopen the circuit, when manual control is released, and an automaticswitch actuated by the driven member to open the circuit and disengagethe coupling when the driven member has completed a predeterminedangular movement.

2. In a machine of the character described, the combination of a drivingmember, a driven member, a releasable coupling for said members, and anelectric circuit controlling said coupling and comprising a normallyopen manually controlled switch, the closing of which causes theengaging of the coupling, and a normally closed automatically controlledswitch cooperating with a movable member of the manually controlledswitch to maintain the circuit through the automatically controlledswitch when the manually controlled switch is closed, and opened by thedriven member, independently of the position of the manually controlledswitch, when the driven member has completed a predetermined movement.

3. In a machine of the character described, the combination of a drivingshaft, a driven shaft having peripherally arranged notches and areleasable coupling for said shafts, comprising a clutch .plate on thedriving shaft having a radially movable clutch dog to engage the notchesof the driven shaft, an arc-shaped cam track, pivotally supported on themachine frame and movable axially of the said shafts to engage said dogand move it out of engagement with said notches, and manually operatedmeans for moving the cam track out of the path of said dog.

CHARLES G. MORTIMER.

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